Safety Header - Viessmann Vitocrossal 200 CM2 Series Installation Instructions Manual

Vitocrossal 200 CM2 Installation Instructions
Boiler Connections
Legend
1 Boiler return: (ANSI flanges 2b in.) *1
2 Boiler supply: (ANSI flanges 2b in.)*1
3 Safety port (Safety valve, low water cutoff and
automatic air vent) NPT 1a
A Cross 1a in.
B Hex bushing 1a in. x e in.
C Air vent with shut-off base
D Hex bushing 1a in. x c in.
E 90° Street elbow c in.
F Nipple c in. x 1 b in.
G Pressure relief valve, 75 psi
H Low water cutoff
4 Air vent or pressure gauge fem. connection NPT b in.
I Hex bushing b in. x a in.
J Pressure gauge
5 Drain and fitting for membrane expansion tank NPT 1
6 Condensing water drain b in. barb connector
K Tee
L Nipple 1 in. x 2 in.
M Reducer coupling 1 in. x c in.
N Sediment faucet c in.
Thermometer *2 (not shown)
*1 Counter flanges (field supplied)
*2 Install anywhere in the supply piping near boiler (not shown)
(continued)

Safety Header

CAUTION
Do not connect heating system to safety header.
1. Locate safety port on boiler.
2. Install safety header to safety port.
Water pressure: 75 psi (5.2 bar)
Testing pressure: 112 psi (8.2 bar)
Min. water pressure: 8 psi (0.5 bar)
Note: The minimum water pressure is necessary for safe
operation.
Safety valve: All boilers must have a pressure relief valve.
Note: Make all connections free of load and torque stresses.
Boiler
13